Force all support programs to use SVG icons by default

Program icons in Ubuntu differ via different shapes, sizes, quality and formats. Some are small, some are heavily pixelated and some are .xpm while others are .png or .svg. So that Rhythmbox's launcher - when added to the desktop - doesn't have a 24x24 pixel icon and so that "Network Tools" under "System" > "Administration" isn't of lower quality than the rest of the icons in the menu, I propose that all program icons in Ubuntu use SVG by default.

Using SVG will allow icons to be constrained to any height and width in the panels, in the dock, in the menus and on the desktop.

Example: Ubuntu should enforcing a size of 48x48 pixel icons on the desktop by default - which have the ability to be stretched to any size by the user - will create unifromity between Ubuntu's Human theme and the default programs. As for the panels (specifically GNOME), the SVG icon will try and maximize it's height and width so that when the panel is 30 pixels large, the icon is 28 pixels, and thus when the panel is constrained, so are the icons in proportion.

This allows for lossless manipulation of icons and a higher quality of imagery and uniformity across Ubuntu.